<template>
    <div class="login_container">
        <div class="login_box">

            <!-- 头像 -->
            <div class="avatar_box">
                <img src="../assets/img/1233l.jpg" alt="">
            </div>

            <!-- 登录表单 -->
            <el-form ref="loginFormRef" :rules="loginFormRules"
            :model="loginForm" label-width="0px" class="login_form">
                <el-form-item prop="username">
                    <el-input v-model="loginForm.username"
                    prefix-icon="iconfont icon-user"></el-input>
                </el-form-item>

                <el-form-item prop="password">
                    <el-input v-model="loginForm.password" type="password"
                    prefix-icon="iconfont icon-lock_fill"></el-input>
                </el-form-item>

                <!-- 按钮 -->
                <el-form-item class="btns">
                    <el-button type="primary" @click="login">登录</el-button>
                    <el-button type="info" @click="resetRef">重置</el-button>
                </el-form-item>
                
            </el-form>

        </div>
    </div>
</template>

<script>
export default {
    data(){
        return{
            loginForm:{
                username:'admin',
                password:'123456'
            },
            // 表单验证规则
            loginFormRules:{
                // 验证用户名是否合法
                username:[
                    { required: true, message: '请输入用户名', trigger: 'blur' },
                    {min:3, max:10, message:'长度在3到10之间',  trigger: 'blur'}
                ],
                // 验证密码
                password:[
                    { required: true, message: '请输入密码', trigger: 'blur' },
                    {min:6, max:15, message:'长度在6到15之间',  trigger: 'blur'}
                ]

            }
        }
    },
    methods:{
        resetRef(){
            // console.log(this);
            this.$refs.loginFormRef.resetFields();
        },
        login(){
            this.$refs.loginFormRef.validate( async valid =>{
                // console.log(valid);
                if(!valid)return;
               const {data:res} = await this.$http.post('login', this.loginForm);
                // console.log(res);
                if(res.meta.status !== 200) return this.$message.error('登陆失败');
                this.$message.success('登录成功');
                // 将登录后的token 保存到客户端的sessionStorage中
                // 项目中除了登录之api接口，必须在登录之后才能访问
                // token只有在当前网站打开期间生效，所以token保存在sessionStorage中
                // 通过编程式导航跳转到后台主页，路由地址是/home
                // console.log(res);
                window.sessionStorage.setItem("token", res.data.token)

                // 编程式导航
                this.$router.push("/home")
            })
        }
    }
};
</script>

<style lang="less" scoped>
.login_container{
        background-color: #2b4b6b;
        height: 100%;
}
.login_box{
    width: 450px;
    height: 300px;
    border-radius: 15px;
    position: absolute;
    left: 50%;
    top: 50%;
    background-color: white;
    transform: translate(-50% , -50%);
}
.avatar_box{
    height: 130px;
    width: 130px;
    border: 1px solid rgb(177, 177, 177);
    background-color: white;
    padding: 10px;
    border-radius: 50%;
    box-shadow: 0 0 10px #ddd;
    position: absolute;
    left: 50%;
    transform: translate(-50%, -50%);
    img{
        height: 100%;
        width: 100%;
        border-radius: 50%;
        background-color: #eee;
    }
}
.login_form{
    position: absolute;
    bottom: 0;
    width: 100%;
    padding: 0 20px;
    box-sizing: border-box;
}
.btns{
    display: flex;
    justify-content: center;
}
</style>
